Hi, I’m a fairly new NixOS user, so I’d really appreciate some help troubleshooting this issue. Right after powering on, my desktop computer shows a very bright manufacturer’s logo, but as soon as the first boot messages appear, the screen gets noticeably darker—even though I’ve set the monitor brightness to 100%. This is also evident, for example, when switching modes or resolutions, where the OSD elements (especially whites) are clearly brighter than what the system itself generates. What can I do to fix this, and what information should I provide to help diagnose it? I’m running Gnome 49 (Wayland), and my graphics card is an RTX 5070 Ti (stable drivers+open kernel modules). On KDE Plasma, the desktop looks a bit better and brighter overall, but the boot fonts are still dimmed. With Gnome, it feels like even the desktop is noticeably darker than it could be.
25.11.4657.1cd347bf3355 (Xantusia)
6.18.6-zen1
lsmod | grep -i nvidia
nvidia_uvm 3973120 16
nvidia_drm 143360 126
nvidia_modeset 2281472 14 nvidia_drm
video 81920 2 amdgpu,nvidia_modeset
drm_ttm_helper 20480 3 amdgpu,nvidia_drm
nvidia 15929344 601 nvidia_uvm,nvidia_modeset
ecc 49152 2 ecdh_generic,nvidia
gnome-randr
supports-mirroring: true
layout-mode: logical
supports-changing-layout-mode: true
global-scale-required: false
logical monitor 0:
x: 0, y: 0, scale: 1.6666666269302368, rotation: normal, primary: yes
associated physical monitors:
DP-1 SAM LC34G55T HNTY906728